Efficient and stable carbon capture from industrial flue gas under humid conditions using amine-functionalized Zr-MOF-808 through statistical process design
- 1Department of Chemical Engineering, BITS Pilani Hyderabad Campus Hyderabad-500078 India
- 2R&D Centre, GAIL (India) Limited Noida U.P - 201301 India +91 4066303998 +91 4066303512
Abstract
Amine functionalization is a well-known approach to enhance CO2 adsorption capacity in metal–organic frameworks (MOFs), especially in humid environments. In this study, triethylenetetramine (TETA) was used to functionalize Zr-MOF-808 via wet impregnation, and its CO2 adsorption studies were performed using wet flue gas. To conduct the adsorption tests, a simulated industrial flue gas mixture was used, containing 12 vol% CO2, 10 vol% H2O, 8 vol% O2, with the remainder being N2. To systematically investigate the effects of various parameters on CO2 adsorption and identify optimal operating conditions, response surface methodology (RSM) combined with a central composite design (CCD) was employed. Under optimal conditions 55 °C temperature, 20 wt% TETA loading, 3 g of adsorbent, and 180 minutes of carbonation time, the model estimated an adsorption capacity of 3.6 mmol g−1, which is very close to the maximum experimental adsorption capacity of 3.4 mmol g−1. The RSM-CCD analysis indicated that both carbonation time and temperature significantly influence the results, while amine loading has a notable quadratic effect. The Avrami model provided the best fit for the kinetic behaviour, whereas the Sips isotherm most accurately described the isotherm behaviour. Moreover, Zr-MOF-808-TETA (20%) retained 88% of its original capacity after 10 consecutive cycles. Therefore, the results indicate that TETA-functionalized Zr-MOF-808 is a potential candidate for CO2 capture under humid simulated flue gas conditions.
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BibTeX
@article{mohiuddin2026efficient,
title = {{Efficient and stable carbon capture from industrial flue gas under humid conditions using amine-functionalized Zr-MOF-808 through statistical process design}},
author = {Neha Mohiuddin and Akshit Kumar and Rajesh Yadav and Satyapaul A. Singh and I. Sreedhar},
journal = {RSC Advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra07412j},
url = {https://doi.org/10.1039/d6ra07412j},
note = {CC BY 3.0},
}
RIS
TY - JOUR
TI - Efficient and stable carbon capture from industrial flue gas under humid conditions using amine-functionalized Zr-MOF-808 through statistical process design
AU - Neha Mohiuddin
AU - Akshit Kumar
AU - Rajesh Yadav
AU - Satyapaul A. Singh
AU - I. Sreedhar
PY - 2026
DA - 2026/10/09
JO - RSC Advances
DO - 10.1039/d6ra07412j
UR - https://doi.org/10.1039/d6ra07412j
AB - Amine functionalization is a well-known approach to enhance CO2 adsorption capacity in metal–organic frameworks (MOFs), especially in humid environments. In this study, triethylenetetramine (TETA) was used to functionalize Zr-MOF-808 via wet impregnation, and its CO2 adsorption studies were performed using wet flue gas. To conduct the adsorption tests, a simulated industrial flue gas mixture was used, containing 12 vol% CO2, 10 vol% H2O, 8 vol% O2, with the remainder being N2. To systematically investigate the effects of various parameters on CO2 adsorption and identify optimal operating conditions, response surface methodology (RSM) combined with a central composite design (CCD) was employed. Under optimal conditions 55 °C temperature, 20 wt% TETA loading, 3 g of adsorbent, and 180 minutes of carbonation time, the model estimated an adsorption capacity of 3.6 mmol g−1, which is very close to the maximum experimental adsorption capacity of 3.4 mmol g−1. The RSM-CCD analysis indicated that both carbonation time and temperature significantly influence the results, while amine loading has a notable quadratic effect. The Avrami model provided the best fit for the kinetic behaviour, whereas the Sips isotherm most accurately described the isotherm behaviour. Moreover, Zr-MOF-808-TETA (20%) retained 88% of its original capacity after 10 consecutive cycles. Therefore, the results indicate that TETA-functionalized Zr-MOF-808 is a potential candidate for CO2 capture under humid simulated flue gas conditions.
SN - 2046-2069
ER -